Doosan G20 SIIIA, Руководство по эксплуатации и техническому обслуживанию

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88 G20, 30, 40 SIIIA Operation & Maintenance Manual
Fan Belt Check
Check the fan belt for tension and abnormalities.
When the belt is depressed 7 - 10 mm with the thumb
(about 100 N [10 kg] pressure) midway between the fan
pulley and alternator pulley, the belt tension is correct.
If the belt tension is too high, it will result in alternator
failure.
A loose belt will cause belt slippage which may result in a
damaged belt, abnormal noise, poor battery charging and
engine overheating.
Coolant Level Check
The coolant level must be between “MAX COLD” and
“MIN” marks on the reserve tank depending on the
temperature of the engine. Check and ensure that the
level is correct.
CAUTION
When removing the radiator filler cap, while the
engine is still hot, cover the cap with cloth, then turn
it slowly to gradually release the internal steam
pressure. this will prevent anyone from being
scalded by hot steam spurting out from the filler
neck.
Add coolant mixed to the correct ratio: 50/50 ethylene
glycol/water.
Radiator Cap Condition
After the replenishment of the coolant, install the radiator
filler cap. Make sure the cap is securely installed.
Battery Cable Connection
Check the battery cable connections for looseness or
corrosion. A loosened cable connection will result in hard
engine starting or insufficient battery charge. The battery
cables must be tightened securely. Never reverse “+” and
“-”
terminals when reconnecting cables after
disconnection. Even a short period of reverse connection
will damage the electrical parts.
Battery Electrolyte level
The amount of electrolyte in the batteries will be reduced
after repeated discharge and recharge. Check the
electrolyte level in the batteries, replenish with a
commercially available electrolyte such as distilled water,
if necessary. The battery electrolyte level checking
procedure will vary with battery type.
NOTE: Do not replenish with dilute sulphuric acid in
the daily service.
CAUTION
When inspecting the batteries, be sure to stop the
engine first.
As dilute sulphuric acid is used as electrolyte, be careful
not to contaminate your eyes, hands, clothes, and metals
with the electrolyte. If it gets in your eye, wash with a
large amount of water at once, then seek medical advice.
As highly flammable hydrogen gas is released from the
batteries, do not create a spark or allow any naked flame
near the batteries.
When handling such metallic articles as tools near the
batteries, be sure not to contact the “+” terminal because
the compressor body is “-” and a dangerous short circuit
might result.
When disconnecting the terminals, start with “-” terminal.
When connecting them, connect the “-” terminal last.
Fuel level
Check the remaining fuel oil level in the fuel tank and
re-fuel if necessary.
A. Battery cable B. Connections